Issued Patents 2021
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11203910 | Casing hanger and annulus sealing device running tool for deepwater drilling, and method for using the same | Deli Gao, Jun Fang, Jing Zeng | 2021-12-21 |
| 10946439 | Plaster casting mold fabrication method for a complicated structure aluminum alloy casting with a large inner cavity and a thin wall | Qiang Chen, Yuanyuan Wan, Zhihui Xing, Gaozhan Zhao, Jianquan Tao +6 more | 2021-03-16 |
| 10913111 | Method for vacuum smelting and variable pressure solidification forming aluminum alloy piece with ultra-thin wall and high gas tightness | Qiang Chen, Yuanyuan Wan, Zhihui Xing, Jianquan Tao, Gaozhan Zhao +6 more | 2021-02-09 |